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Kevin Aylward
Guest

Wed Sep 29, 2004 5:10 pm   



David Harmon wrote:
Quote:
On Sat, 2 Aug 2003 23:28:06 +0100 in sci.electronics.cad,
"Kevin Aylward" <kevin_at_anasoft.co.uk> wrote:

nws wrote:
In the Eagle system, we have nets and we have signals, what

[chop]

Indeed I do. I am discussing general terms on schematic captures, I
was not referring specifically to idiosyncrasies of Eagle. It was not
apparent that your issue was Eagle specific,

Oh come on, what do you think that "In the Eagle system" as written
by the original poster and quoted in your reply means then? It
means that the whole thread is Eagle specific.

It means the the poster *believes* that the question is specific to a
product.

Quote:
It means that your
reply is completely worthless, in the context of the Eagle system.
The qualification "In the Eagle system" could not possibly have been
more clear.

Not relevant. It is very, very common for people to ask questions,
believing that it is specific to some particular product, but in fact,
has nothing particular to do with that product. One only has to note how
often people request PSpice information, when in fact, its generic Spice
information they are after. Go and read some posts, and look at the
replies.

Quote:
You failed to read the post you were responding to.

Nope. I took an assumption that the poster might be looking for generic
information. Any fool, can read "Eagle". One tries to read between the
lines when people post. Its very rare that what people request is
actually what they want.

Quote:

If you know what the asinine way that Eagle defines their own
terminology, why did you post in the first place?

I didn't post "in the first place". Again you failed to read the
post you are responding to. I was answering the question posed by
the original poster, "nws".

My apologise, I missed this.

Kevin Aylward
salesEXTRACT_at_anasoft.co.uk
http://www.anasoft.co.uk
SuperSpice, a very affordable Mixed-Mode
Windows Simulator with Schematic Capture,
Waveform Display, FFT's and Filter Design.

Kevin Aylward
Guest

Wed Sep 29, 2004 5:10 pm   



David Harmon wrote:
Quote:
On Sat, 2 Aug 2003 23:28:06 +0100 in sci.electronics.cad,
"Kevin Aylward" <kevin_at_anasoft.co.uk> wrote:

nws wrote:
In the Eagle system, we have nets and we have signals, what

[chop]

Indeed I do. I am discussing general terms on schematic captures, I
was not referring specifically to idiosyncrasies of Eagle. It was not
apparent that your issue was Eagle specific,

Oh come on, what do you think that "In the Eagle system" as written
by the original poster and quoted in your reply means then? It
means that the whole thread is Eagle specific.

It means the the poster *believes* that the question is specific to a
product.

Quote:
It means that your
reply is completely worthless, in the context of the Eagle system.
The qualification "In the Eagle system" could not possibly have been
more clear.

Not relevant. It is very, very common for people to ask questions,
believing that it is specific to some particular product, but in fact,
has nothing particular to do with that product. One only has to note how
often people request PSpice information, when in fact, its generic Spice
information they are after. Go and read some posts, and look at the
replies.

Quote:
You failed to read the post you were responding to.

Nope. I took an assumption that the poster might be looking for generic
information. Any fool, can read "Eagle". One tries to read between the
lines when people post. Its very rare that what people request is
actually what they want.

Quote:

If you know what the asinine way that Eagle defines their own
terminology, why did you post in the first place?

I didn't post "in the first place". Again you failed to read the
post you are responding to. I was answering the question posed by
the original poster, "nws".

My apologise, I missed this.

Kevin Aylward
salesEXTRACT_at_anasoft.co.uk
http://www.anasoft.co.uk
SuperSpice, a very affordable Mixed-Mode
Windows Simulator with Schematic Capture,
Waveform Display, FFT's and Filter Design.

Ulrich Strate
Guest

Wed Sep 29, 2004 5:10 pm   



Hello,

Helmut Sennewald wrote:

Quote:
When I use the correct command PULSE(0 1 0 9.98u 20n 0n 10u),
I still have got the error message and the wrong period.
The only way to overcome this problem is something like
PULSE(0 1 0 9.98u 19.999n 0n 10u) .

I tried n's instead of u's and it worked:

PULSE(0 1 0 9.98u 20n 0n 10000n)

regards
Ulrich

Helmut Sennewald
Guest

Wed Sep 29, 2004 5:10 pm   



"Ulrich Strate" <df4kv_at_web.de> schrieb im Newsbeitrag
news:bgjn6f$p6cq8$1_at_ID-125754.news.uni-berlin.de...
Quote:
Hello,

Helmut Sennewald wrote:

When I use the correct command PULSE(0 1 0 9.98u 20n 0n 10u),
I still have got the error message and the wrong period.
The only way to overcome this problem is something like
PULSE(0 1 0 9.98u 19.999n 0n 10u) .

I tried n's instead of u's and it worked:

PULSE(0 1 0 9.98u 20n 0n 10000n)

Hello Ulrich,
thanks for the tipp.

I am shure your workaround peforms by luck and nobody can guarantee it
will work with most other numbers. The whole case is simply a floating
point number problem which needs special treatment.

I hope Mike implements something similar to the proposal in my previous
posting.

Best Regards
Helmut

Ulrich Strate
Guest

Wed Sep 29, 2004 5:10 pm   



Helmut Sennewald wrote:
Quote:
"Ulrich Strate" <df4kv_at_web.de> schrieb im Newsbeitrag
news:bgjn6f$p6cq8$1_at_ID-125754.news.uni-berlin.de...

Hello,

Helmut Sennewald wrote:


When I use the correct command PULSE(0 1 0 9.98u 20n 0n 10u),
I still have got the error message and the wrong period.
The only way to overcome this problem is something like
PULSE(0 1 0 9.98u 19.999n 0n 10u) .

I tried n's instead of u's and it worked:

PULSE(0 1 0 9.98u 20n 0n 10000n)


Hello Ulrich,
thanks for the tipp.

I am shure your workaround peforms by luck and nobody can guarantee it
will work with most other numbers. The whole case is simply a floating
point number problem which needs special treatment.

Yes, of course I agree. Your suggested cure looks reasonable, rather
adjusting waveforms than clock frequencies which often need to be
xtal-controlled in real life..
I encountered that problem (not considering it as a "bug" then) a few times
before, so I got used to check the error log for timing overlaps followed
by "tuning".

regards
Ulrich

p.s.: THX for your numerous very helpful hints concerning import of models
etc.!

Jim Thompson
Guest

Wed Sep 29, 2004 5:10 pm   



On 04 Aug 2003 17:45:18 GMT, "Mike Engelhardt" <pmte_at_concentric.net>
wrote:

Quote:
This really just deals with the fact the LTspice has been extended
to allow the pulse function to work as a triangular wave. However,
it could have trouble with both on time and off times being zero,
so it made an adjustment if it didn't numerically work out so that
it could reliably give you the triangular wave and issue the warning
in the .log file.

To get some perspective, run the following deck in PSpice and see
how a standard simulator completely corrupts the wave form:

* triangular wave
V1 N001 0 pulse(0 1 0 .5m .5m 0 1m)
[snip]


V1 N001 0 pulse(0 1 0 .5m .5m 1p 1m) ; Works Just Ducky ;-)

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice:(480)460-2350 | |
| Jim-T_at_analog_innovations.com Fax:(480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

For proper E-mail replies SWAP "-" and "_"

Why is it that Democrats can't debate politely?
And are only rude and interruptive.
Lack of mental capacity?

Mike Engelhardt
Guest

Wed Sep 29, 2004 5:10 pm   



Chris,

LTspice uses it's own string to double routines so different ways
of writing the same number can lead to a different value in the
equivalent of the 16th digit when converted to binary floating
point.

They all simulate identically under the current version, 2.04t.

--Mike

"Chris Carlen" <crobc_at_BOGUSFIELD.earthlink.net> wrote in message
news:bgn3o30tma_at_enews4.newsguy.com...
Quote:
Mike Engelhardt wrote:
This really just deals with the fact the LTspice has been extended
to allow the pulse function to work as a triangular wave. However,
it could have trouble with both on time and off times being zero,
so it made an adjustment if it didn't numerically work out so that
it could reliably give you the triangular wave and issue the warning
in the .log file.

To get some perspective, run the following deck in PSpice and see
how a standard simulator completely corrupts the wave form:

* triangular wave
V1 N001 0 pulse(0 1 0 .5m .5m 0 1m)
R1 N001 0 1K
.tran 3m 3m
.probe
.end

Anyway, the core trouble with Ton=Toff=0 has been resolved in
version 2.04p so that it no longer has to extend the period
numerically significantly to reliably execute a triangular wave.
However, if the period is specified and is less then
Trise+Tfall+Ton, then it is still extended to Trise+Tfall+Ton
and the same warning is issued.

Chris's deck will now run as he expected.

--Mike


Hi Mike, thanks for the update which I'll download in a minute.

But how do you explain this (in ver. 2.04o):

* Y:\spice\LT-SWcad\solenoid.drive\pulse-bug.asc
V1 N001 0 PULSE(0 1 0 9u 1u 0 10u)
V2 N002 0 PULSE(0 1 0 9E-6 1E-6 0 10E-6)
V3 N003 0 PULSE(0 1 0 0.000009 0.000001 0 0.00001)
.tran 0 1000u 0 50n
.backanno
.end

The warnings are issued for V1 and V2, but *not* V3 which simulates as I
expected.

???


Good day!



--
_____________________
Christopher R. Carlen
crobc_at_earthlink.net
Suse 8.1 Linux 2.4.19


Brad Velander
Guest

Wed Sep 29, 2004 5:10 pm   



Gone bye, bye!
Try the Altium website to find tutorials and or PDF documents outlining
the new methodogies.

--
Sincerely,
Brad Velander

"EmSinc" <EmSinc_at_hotmail.com> wrote in message
news:ScdYa.53205$PD3.4550821_at_nnrp1.uunet.ca...
Quote:
Hi,

I've just started my first PCB with DXP version and I'm looking for Global
button in the components properties (from 99SE ). Was it removed or
changed
the location only?
Thanks in advance for any help.

Adam



EmSinc
Guest

Wed Sep 29, 2004 5:10 pm   



I found it. The name of the function/button is gone but you can apply the
global changes with Find Similar Objects function from right-click menu in
SCH or PCB.

Adam




"Brad Velander" <spam_this_at_nowhere.com> wrote in message
news:cFmYa.45289$LD6.993074_at_news0.telusplanet.net...
Quote:
Gone bye, bye!
Try the Altium website to find tutorials and or PDF documents
outlining
the new methodogies.

--
Sincerely,
Brad Velander

"EmSinc" <EmSinc_at_hotmail.com> wrote in message
news:ScdYa.53205$PD3.4550821_at_nnrp1.uunet.ca...
Hi,

I've just started my first PCB with DXP version and I'm looking for
Global
button in the components properties (from 99SE ). Was it removed or
changed
the location only?
Thanks in advance for any help.

Adam





Spehro Pefhany
Guest

Wed Sep 29, 2004 5:10 pm   



On 7 Aug 2003 09:29:49 -0700, the renowned priyal1977_at_yahoo.com
(Priyal) wrote:

Quote:
Hi all,
I have a PCB that is already fabricated and ready to use. There are
several ICs on this board. I just discovered that the pin-assignment
of one of the ICs differs a lot from the pin-out of its datasheet.
I do NOT want to re-spin the board as it will cost me too much.
I am planning to layout another board (a small one) on which i will
put this IC.

My question is, is there any way i can connect these 2 boards to
communicate with each other? Will these be a feasible solution?

Maybe. What kind of package is involved.. is it a 500+ pin BGA or a
TSSOP-48 or a DIP-40? If it's a DIP package and you can buy a smaller
SMT part you might be able to make a tiny board that fits overtop the
original footprint.

If it's just a couple of pins, you might be able to fix it by lifting
legs and using magnet wire and perhaps a drip or two of epoxy to tack
the wires.

Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff_at_interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com

EmSinc
Guest

Wed Sep 29, 2004 5:10 pm   



I found it. The name of the function/button is gone but you can apply the
global changes with Find Similar Objects function from right-click menu in
SCH or PCB.

Adam


"Brad Velander" <spam_this_at_nowhere.com> wrote in message
news:cFmYa.45289$LD6.993074_at_news0.telusplanet.net...
Quote:
Gone bye, bye!
Try the Altium website to find tutorials and or PDF documents
outlining
the new methodogies.

--
Sincerely,
Brad Velander

"EmSinc" <EmSinc_at_hotmail.com> wrote in message
news:ScdYa.53205$PD3.4550821_at_nnrp1.uunet.ca...
Hi,

I've just started my first PCB with DXP version and I'm looking for
Global
button in the components properties (from 99SE ). Was it removed or
changed
the location only?
Thanks in advance for any help.

Adam





Jim Thompson
Guest

Wed Sep 29, 2004 5:10 pm   



On Thu, 7 Aug 2003 00:23:19 -0300, Chaos Master
<renanNOSPAM_at_punks.net> wrote:

Quote:
Anybody here has a SPICE model for a Schmitt trigger?

What variety of Spice?

Specific trip levels or generic?

Speed of operation?

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice:(480)460-2350 | |
| Jim-T_at_analog_innovations.com Fax:(480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

For proper E-mail replies SWAP "-" and "_"

Why is it that Democrats can't debate politely?
And are only rude and interruptive.
Lack of mental capacity?

Chaos Master
Guest

Wed Sep 29, 2004 5:10 pm   



Thy person named Jim Thompson wrote:
Quote:
On Thu, 7 Aug 2003 00:23:19 -0300, Chaos Master
renanNOSPAM_at_punks.net> wrote:

Anybody here has a SPICE model for a Schmitt trigger?

What variety of Spice?
PSpice 9.1 Student, preferably.

But if needed, I have SuperSpice.
Quote:
Specific trip levels or generic?
Generic.
Speed of operation?
I don't know about this.

--
To contact via e-mail please replace(email address,nospam,rc).
Spam is redirected to \dev\null or Trash Bin, depending on your OS.

Kevin Aylward
Guest

Wed Sep 29, 2004 5:10 pm   



Chaos Master wrote:
Quote:
Anybody here has a SPICE model for a Schmitt trigger?

SuperSpice has a working cmos Schmitt trigger schematic example. There
are also full cmos Schmitt trigger models in the AnalogeDigital library.

Kevin Aylward
salesEXTRACT_at_anasoft.co.uk
http://www.anasoft.co.uk
SuperSpice, a very affordable Mixed-Mode
Windows Simulator with Schematic Capture,
Waveform Display, FFT's and Filter Design.

Jim Thompson
Guest

Wed Sep 29, 2004 5:10 pm   



On Fri, 8 Aug 2003 00:38:39 -0300, Chaos Master
<renanNOSPAM_at_punks.net> wrote:

Quote:
Thy person named Jim Thompson wrote:
On Thu, 7 Aug 2003 00:23:19 -0300, Chaos Master
renanNOSPAM_at_punks.net> wrote:

Anybody here has a SPICE model for a Schmitt trigger?

What variety of Spice?
PSpice 9.1 Student, preferably.
But if needed, I have SuperSpice.
Specific trip levels or generic?
Generic.
Speed of operation?
I don't know about this.

For a totally programmable Schmitt trigger, see "EasySchmitt.pdf" on
the S.E.D/Schematic page of my website.

I don't know if the Student version will do the NANDs. If not,
replace with your typical S-R-Flop made from NPNs.

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice:(480)460-2350 | |
| Jim-T_at_analog_innovations.com Fax:(480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

For proper E-mail replies SWAP "-" and "_"

Why is it that Democrats can't debate politely?
And are only rude and interruptive.
Lack of mental capacity?

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